No such thing as an unbiased firearm review. Likely no such thing as an unbiased anything review.
You could probably come up with some kind of objective tests like "we measured the terminal ft/lbs of energy delivered by these guns". The objective results might suggest, let's say, the S&W 500 mag with 8 3/8 bbl is "best". Then, obviously, to suggest to the young lady in the thread that asked "What's the best gun, I'm a newbee?" that she needs one would be silly.
You can't objectivly measure or report on things like "smooth trigger", "Natural point", "Hand fit" and esp stuff like "looks". And all that kind of subjective stuff is what makes me like THIS brand/style of gun while you like THAT brand/style of gun. How many times do we read, right here, "But I just don't like the feel of the Binford autoloaders". Or, "Those Kenmore revolvers just look weird to me".
Sgt Lumpy